Server-Side Template Injection Vulnerability in PDF Signer by Simcy Creative
CVE-2019-25729

9.3CRITICAL

Key Information:

Vendor

Simcy Creative

Status
PDF Signer
Vendor
CVE Published:
4 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2019-25729?

PDF Signer 3.0 has a vulnerability that allows unauthenticated attackers to exploit server-side template injection through the CSRF-TOKEN cookie parameter. By injecting PHP commands into crafted cookie values, attackers can execute arbitrary code on the server, including invoking system commands with functions like shell_exec(). This exploitation can lead to unauthorized access and retrieval of sensitive information, posing a significant risk to affected installations. It is crucial for users of PDF Signer to update to secure versions immediately.

Affected Version(s)

PDF Signer 3.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2019-25729 - Proof of Concept

References

https://www.exploit-db.com/exploits/46276
exploit
https://codecanyon.net/user/simcy_creative
product
https://codecanyon.net/item/signer-create-digital-signatu...
product

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

dd_ (info@malicious.group)
.